Evaluation of a new low-dose digital X-ray device: first dosimetric and clinical results in children

Kalifa, G.; Charpak, Y; Maccia, C.; Féry-Lemonnier, E.; Bloch, Juliette; Boussard, Jean-Marc; Attal, M; Dubousset, Jean; Adamsbaum, C.

doi:10.1007/s002470050413

Cited by 152 publications

(81 citation statements)

References 3 publications

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“…EOS* (EOS-Imaging) is a low-dose imaging system providing simultaneous AP and lateral views in a stand-up position [10][11][12]. Semiautomatic 3D reconstruction, using SterEOS software [12,13] (EOS-Imaging), is based on identifiable anatomic points.…”

Section: Patientsmentioning

confidence: 99%

Transverse plane 3D analysis of mild scoliosis

et al. 2013

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Purpose To demonstrate the reality of a transverse plane pattern independent of the scoliotic curve location and to show the importance of the transverse plane pattern in the assessment of the progression risk in a population of mild scoliosis. Methods Spines of 111 patients with adolescent idiopathic mild scoliosis were reconstructed using biplanar stereoradiography. The apical axial rotation, the intervertebral axial rotation at junctions and the torsion index were computed. Mean values of each parameter were compared between thoracic, thoracolumbar and lumbar curves. Then a cluster analysis was performed using these parameters on 78 patients with effective outcomes at skeletal maturity. The effective outcomes and the results reached with the statistical analysis were compared and analyzed (ROC and logistic regression). Results No statistical difference was observed when considering each parameter between the different types of curves. Two clusters independent of the curve type were identified. The mean values of transverse plane parameters were significantly higher in Cluster 1 than in Cluster 2. 91 % of patients classified in Cluster 1 had progressive curve and 73 % of patients classified in Cluster 2 remained stable at skeletal maturity. All parameters were good predictors but the best was the torsion index.Conclusions This study demonstrated that a transverse plane pattern combining apical axial rotation, the intervertebral axial rotation at junctions and the torsion index is independent of the scoliotic curve location and significant in the determination of the progression risk of mild scoliosis.

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Section: Patientsmentioning

confidence: 99%

Transverse plane 3D analysis of mild scoliosis

et al. 2013

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“…A radiological device based on his detector enabled obtaining good-quality radiographs at significantly lower radiation doses [22].…”

Section: Introductionmentioning

confidence: 99%

“…This system is based on a double innovation: it allows obtaining high quality two-dimensional (2D) perpendicular images in an upright position [23,24], as well as providing 3D visualization of the entire skeleton from head to toe, by parametric surface 3D models created with new 3D reconstruction techniques [25,26]. Using an EOS 2D/3D system, the radiation dose required to obtain good-quality 2D images of the skeletal system was reduced by 80-90 %, and to generate a 3D reconstruction from a CT scan dramatically decreased to a level of 800-1,000 times less [22,24].…”

Section: Introductionmentioning

confidence: 99%

Comparison of scoliosis measurements based on three-dimensional vertebra vectors and conventional two-dimensional measurements: advantages in evaluation of prognosis and surgical results

Illés

Somoskeőy

2013

Eur Spine J

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Purpose A new concept of vertebra vectors based on spinal three-dimensional (3D) reconstructions of images from the EOS system, a new low-dose X-ray imaging device, was recently proposed to facilitate interpretation of EOS 3D data, especially with regard to horizontal plane images. This retrospective study was aimed at the evaluation of the spinal layout visualized by EOS 3D and vertebra vectors before and after surgical correction, the comparison of scoliotic spine measurement values based on 3D vertebra vectors with measurements using conventional twodimensional (2D) methods, and an evaluation of horizontal plane vector parameters for their relationship with the magnitude of scoliotic deformity. Methods 95 patients with adolescent idiopathic scoliosis operated according to the Cotrel-Dubousset principle were subjected to EOS X-ray examinations pre-and postoperatively, followed by 3D reconstructions and generation of vertebra vectors in a calibrated coordinate system to calculate vector coordinates and parameters, as published earlier. Conclusions Vertebra vectors provide a key opportunity to visualize spinal deformities in all three planes simultaneously. Measurement methods based on vertebral vectors proved to be just as accurate and reliable as conventional measurement methods for coronal and sagittal plane parameters. In addition, the horizontal plane display of the curves can be studied using the same vertebra vectors. Based on the vertebra vectors data, during the surgical treatment of spinal deformities, the diminution of the lateral translation of the vertebras seems to be more important in the results of the surgical correction than the correction of the axial rotation.

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“…Additionally, the EOS 1 imaging system (EOS Imaging Inc, Cambridge, MA, USA), is fast emerging as a low-radiation alternative to conventional radiography, and in certain circumstances, even CT for 3-D assessment [8,12,15,20]. EOS 1 imaging uses a slot scanner that creates a horizontal fan beam and then physically moves vertically to capture the designated body part [6] as opposed to conventional radiography which uses a fixed cone beam [3].…”

Section: Introductionmentioning

confidence: 99%

“…EOS 1 imaging uses a slot scanner that creates a horizontal fan beam and then physically moves vertically to capture the designated body part [6] as opposed to conventional radiography which uses a fixed cone beam [3]. Radiation doses of EOS 1 have been reported as eight to 10 times less than conventional radiography and 800 to 1000 times less than CT [15,20,31]. A couple studies have validated the use and reliability of EOS 1 in imaging of the hip and lower extremities [18,31].…”

Section: Introductionmentioning

confidence: 99%

Reliability of Overcoverage Parameters With Varying Morphologic Pincer Features: Comparison of EOS® and Radiography

Monazzam¹,

Agashe²,

Hosalkar³

2013

Clinical Orthopaedics &Amp; Related Research

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Background Multiple radiographic parameters used for diagnosis and quantification of morphologic pincer features have emerged, but the degree to which pelvic tilt or rotation affects conventional radiography and EOS 1 is unknown. Question/purposes We asked: (1) What is the reliability of EOS 1 and conventional radiography at increasing sizes of morphologic pincer features with varying degrees of tilt and rotation? (2) What is the effect of tilt and rotation on acetabular overcoverage measurements? Methods Using a dry cadaveric pelvis, AP conventional radiographs and EOS 1 images were taken at intervals of increasing modeled pincer size with 0°to 15°varying tilt and rotation. Lateral center-edge angle, Sharp angle, Tönnis angle, crossover sign, and retroversion index were measured on all images. Statistical analysis was conducted. Results The intermodality intraclass correlation coefficients for conventional radiography and EOS 1 radiography across all pincer sizes, rotations, and tilts were excellent (0.93-0.98). Crossover sign was in perfect agreement in conventional radiography and EOS 1 . Rotation of the hip away from the beam source and/or increased anterior tilt falsely increased all overcoverage parameters except for Tönnis angle. Rotation away from the beam of 10°or greater or anterior tilt of 5°or greater produced a false-positive crossover sign. Conclusions EOS 1 radiography maintained excellent reliability in comparison to conventional radiography but both were equally vulnerable to the effects of tilt and rotation for quantification of hip parameters used in acetabular overcoverage assessment. A standardized pelvic radiograph ensuring that the pelvis is not excessively tilted or rotated should be used for assessing acetabular overcoverage parameters.

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Evaluation of a new low-dose digital X-ray device: first dosimetric and clinical results in children

Abstract: This new device allows spectacular dose reduction, consistent with adequate clinical information. Improvements of the prototype will lead to extension of potential indications and industrial development.

Cited by 152 publications

References 3 publications

Transverse plane 3D analysis of mild scoliosis

Transverse plane 3D analysis of mild scoliosis

Comparison of scoliosis measurements based on three-dimensional vertebra vectors and conventional two-dimensional measurements: advantages in evaluation of prognosis and surgical results

Reliability of Overcoverage Parameters With Varying Morphologic Pincer Features: Comparison of EOS® and Radiography

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